公开(公告)号：US09450542B2

公开(公告)日：2016-09-20

申请号：US14413483

申请日：2013-01-16

申请人： Daisuke Mita ,  Masaki Noda ,  Masamichi Nogami

发明人： Daisuke Mita ,  Masaki Noda ,  Masamichi Nogami

IPC分类号： H03F3/08 ,  H03G3/30

CPC分类号： H03F3/08 ,  H03G3/3084

摘要： A current bypass circuit that passes part of a photocurrent output from a photodetector is connected to an input terminal of a current-to-voltage conversion amplifier circuit. A voltage obtained by level conversion of an output voltage by a voltage level conversion circuit is input into the current bypass circuit so that the current bypass circuit is turned on at a photocurrent that is smaller than the photocurrent at which a diode connected in parallel to a feedback resistor of the current-to-voltage conversion amplifier circuit is turned on. Consequently, the current-to-voltage conversion gain is switched in three stages according to the intensity of the photocurrent corresponding to an optical signal level.

摘要翻译： 将来自光电检测器的光电流输出的一部分的电流旁路电路连接到电流 - 电压转换放大器电路的输入端。 通过电压电平转换电路对输出电压进行电平转换而获得的电压被输入到电流旁路电路中，使得电流旁路电路以小于并联到二极管的二极管的光电流的光电流导通 电流 - 电压转换放大器电路的反馈电阻器被接通。 因此，根据与光信号电平对应的光电流的强度，电流 - 电压转换增益分三级切换。

公开(公告)号：US20150207469A1

公开(公告)日：2015-07-23

申请号：US14413483

申请日：2013-01-16

申请人： Daisuke Mita ,  Masaki Noda ,  Masamichi Nogami

发明人： Daisuke Mita ,  Masaki Noda ,  Masamichi Nogami

IPC分类号： H03F3/08 ,  H03G3/30

CPC分类号： H03F3/08 ,  H03G3/3084

摘要： A current bypass circuit that passes part of a photocurrent output from a photodetector is connected to an input terminal of a current-to-voltage conversion amplifier circuit. A voltage obtained by level conversion of an output voltage by a voltage level conversion circuit is input into the current bypass circuit so that the current bypass circuit is turned on at a photocurrent that is smaller than the photocurrent at which a diode connected in parallel to a feedback resistor of the current-to-voltage conversion amplifier circuit is turned on. Consequently, the current-to-voltage conversion gain is switched in three stages according to the intensity of the photocurrent corresponding to an optical signal level.

摘要翻译： 将来自光电检测器的光电流输出的一部分的电流旁路电路连接到电流 - 电压转换放大器电路的输入端。 通过电压电平转换电路对输出电压进行电平转换而获得的电压被输入到电流旁路电路中，使得电流旁路电路以小于并联到二极管的二极管的光电流的光电流导通 电流 - 电压转换放大器电路的反馈电阻器被接通。 因此，根据与光信号电平对应的光电流的强度，电流 - 电压转换增益分三级切换。

公开(公告)号：US08165478B2

公开(公告)日：2012-04-24

申请号：US12516574

申请日：2006-12-21

申请人： Masaki Noda ,  Masamichi Nogami ,  Junichi Nakagawa

发明人： Masaki Noda ,  Masamichi Nogami ,  Junichi Nakagawa

IPC分类号： H04B10/06

CPC分类号： H03G3/3084 ,  H04B10/6931 ,  H04B10/695

摘要： An optical receiver of wide-dynamic range characteristic that stably reproduces a burst signal having different light receiving levels. A preamplifier converts an output from a light receiving element into a voltage signal. A level detecting circuit includes: a first level detecting unit having a shorter time constant; and a second level detecting unit having a longer time constant and switching over to any of the level detecting units in response to a time constant switching signal to detect a voltage level of an output voltage signal output from the preamplifier. An amplifier variably controls conversion gain of the preamplifier based on the detecting result. A time constant switching control outputs the time constant switching signal to the level detecting unit based on the output voltage signal from the preamplifier, to select the first level detecting unit or the second detecting unit based on a number of consecutive identical digits being equal to, smaller, or larger than the predetermined number.

摘要翻译： 具有宽动态范围特性的光接收机，其稳定地再现具有不同光接收电平的脉冲串信号。 前置放大器将来自光接收元件的输出转换成电压信号。 电平检测电路包括：具有较短时间常数的第一电平检测单元; 以及具有较长时间常数的第二电平检测单元，并且响应于时间常数切换信号切换到任何电平检测单元，以检测从前置放大器输出的输出电压信号的电压电平。 放大器基于检测结果可变地控制前置放大器的转换增益。 时间常数切换控制基于来自前置放大器的输出电压信号将时间常数切换信号输出到电平检测单元，基于等于的连续相同数字的数量来选择第一电平检测单元或第二检测单元， 小于或大于预定数量。

公开(公告)号：US07609980B2

公开(公告)日：2009-10-27

申请号：US10585458

申请日：2005-09-28

申请人： Masamichi Nogami ,  Junichi Nakagawa ,  Masaki Noda ,  Toyoaki Uo

发明人： Masamichi Nogami ,  Junichi Nakagawa ,  Masaki Noda ,  Toyoaki Uo

IPC分类号： H04B10/06

CPC分类号： H04L25/061 ,  H03G3/3084 ,  H04B10/6931 ,  H04B10/695

摘要： A first average detecting circuit detects an average of output signals of a pre-amplifying unit that controls an amplification gain based on a result of comparison between an output of the first average detecting circuit and a predetermined reference voltage. A discriminating circuit receives an output signal of the pre-amplifying unit as an input signal and performs a signal discrimination of the input signal based on a threshold. A second average detecting circuit detects an average of input signals to the discriminating circuit. The discriminating circuit receives an output of the second average detecting circuit as the threshold.

摘要翻译： 第一平均检测电路基于第一平均检测电路的输出与预定参考电压之间的比较结果来检测控制放大增益的预放大单元的输出信号的平均值。 识别电路接收预放大单元的输出信号作为输入信号，并且基于阈值执行输入信号的信号鉴别。 第二平均检测电路检测到鉴别电路的输入信号的平均值。 识别电路接收第二平均检测电路的输出作为阈值。

公开(公告)号：US20090252504A1

公开(公告)日：2009-10-08

申请号：US12086292

申请日：2006-03-03

申请人： Masaki Noda ,  Masamichi Nogami ,  Junichi Nakagawa

发明人： Masaki Noda ,  Masamichi Nogami ,  Junichi Nakagawa

IPC分类号： H04B10/06

CPC分类号： H03F3/08 ,  H03G3/001 ,  H03G3/3084 ,  H04B10/6931

摘要： Provided is an optical receiver which has a wide dynamic range characteristic for stably reproducing packets having different light receiving levels, and which is superior in high-speed responsiveness and consecutive same binary symbols tolerance.The optical receiver includes: a light receiving element 1 for outputting a current in response to a light receiving level of an optical signal; a preamplifier 2 whose gain is controlled in a variable manner based upon a control voltage, for converting the current signal outputted from the light receiving element into a voltage signal; a consecutive same binary symbols detecting circuit 5 for detecting a consecutive same binary symbols portion from a binary symbols stream of the voltage signal outputted from the preamplifier to output a time constant switching signal in response to a detection result thereof; a level detecting circuit 3 for detecting a voltage level of the voltage signal outputted from the preamplifier based upon a time constant which is switched/controlled in response to the time constant switching signal; and an amplifier 4 for amplifying an output voltage of the level detecting circuit to apply a control voltage for controlling the gain to the preamplifier.

摘要翻译： 提供了一种具有宽动态范围特性的光接收机，用于稳定地再现具有不同光接收电平的分组，并且其具有优异的高速响应性和连续相同的二进制符号容限。 光接收器包括：光接收元件1，用于响应光信号的光接收电平输出电流; 基于控制电压以可变方式控制增益的前置放大器2，用于将从光接收元件输出的电流信号转换为电压信号; 连续相同的二进制符号检测电路5，用于从前置放大器输出的电压信号的二进制符号流检测连续的相同的二进制符号部分，以响应其检测结果输出时间常数切换信号; 电平检测电路3，用于基于根据时间常数切换信号切换/控制的时间常数来检测从前置放大器输出的电压信号的电压电平; 以及放大器4，用于放大电平检测电路的输出电压，以将用于控制增益的控制电压施加到前置放大器。

公开(公告)号：US20150295659A1

公开(公告)日：2015-10-15

申请号：US14354293

申请日：2012-01-25

申请人： Masamichi Nogami ,  Satoshi Yoshima ,  Masaki Noda ,  Junichi Nakagawa

发明人： Masamichi Nogami ,  Satoshi Yoshima ,  Masaki Noda ,  Junichi Nakagawa

IPC分类号： H04B10/60 ,  H04J14/08 ,  H04B10/27

CPC分类号： H04B10/60 ,  H03F3/08 ,  H04B10/07955 ,  H04B10/27 ,  H04B10/272 ,  H04B10/69 ,  H04J14/08

摘要： An optical receiver includes a light receiving element configured to convert an input light signal into an electric current, a current mirror circuit including a reference current side transistor and a mirror current side transistor, the transistor being connected to the light receiving element, a current-voltage conversion circuit configured to convert an output current from the transistor into a voltage and output the voltage as a light reception level monitor voltage of the light receiving element, and a current sink circuit connected to the transistor and configured to feed an electric current to the transistor.

摘要翻译： 一种光接收器包括被配置为将输入光信号转换为电流的光接收元件，包括参考电流侧晶体管和反射镜电流侧晶体管的电流镜电路，该晶体管连接到光接收元件， 电压转换电路，被配置为将来自晶体管的输出电流转换为电压，并将作为光接收元件的光接收电平监视电压的电压输出;以及连接到晶体管并被配置为将电流馈送到 晶体管。

公开(公告)号：US09094134B2

公开(公告)日：2015-07-28

申请号：US14003139

申请日：2011-04-05

申请人： Masaki Noda ,  Masamichi Nogami ,  Junichi Nakagawa

发明人： Masaki Noda ,  Masamichi Nogami ,  Junichi Nakagawa

IPC分类号： H04B10/69 ,  H03G3/30

CPC分类号： H04B10/6931 ,  H03G3/3084 ,  H04B10/693

摘要： An optical receiver including: a preamplifier capable of changing a conversion gain in accordance with a reception level of a received burst signal; a gain control circuit capable of switching between a fast time constant and a slow time constant; and a convergence determination circuit for outputting a time constant switching signal in accordance with a state of the gain control circuit (transient state or steady state) and a reset signal between the burst signals. This configuration can switch the time constant of the gain control circuit at an appropriate timing.

摘要翻译： 一种光接收机，包括：前置放大器，其能够根据接收到的突发信号的接收电平来改变转换增益; 能够在快速时间常数和慢时间常数之间切换的增益控制电路; 和用于根据增益控制电路的状态（瞬态或稳态）输出时间常数切换信号和突发信号之间的复位信号的会聚判定电路。 该配置可以在适当的时刻切换增益控制电路的时间常数。

公开(公告)号：US08155535B2

公开(公告)日：2012-04-10

申请号：US12086292

申请日：2006-03-03

申请人： Masaki Noda ,  Masamichi Nogami ,  Junichi Nakagawa

发明人： Masaki Noda ,  Masamichi Nogami ,  Junichi Nakagawa

IPC分类号： H04B10/06

CPC分类号： H03F3/08 ,  H03G3/001 ,  H03G3/3084 ,  H04B10/6931

摘要： An optical receiver for stably reproducing packets having different light receiving levels is disclosed. The optical receiver includes: a light receiving element for outputting a current in response to a light receiving level of an optical signal; a preamplifier for converting the current signal outputted from the light receiving element into a voltage signal; a circuit for detecting a consecutive same binary symbols portion from a binary symbols stream of the voltage signal outputted from the preamplifier to output a time constant switching signal in response to a detection result thereof; a level detecting circuit for detecting a voltage level of the voltage signal outputted from the preamplifier based upon a time constant which is switched/controlled in response to the time constant switching signal; and an amplifier for amplifying an output voltage of the level detecting circuit to apply a control voltage for controlling the gain to the preamplifier.

摘要翻译： 公开了一种用于稳定再现具有不同光接收电平的分组的光接收机。 光接收器包括：用于响应于光信号的光接收电平输出电流的光接收元件; 用于将从光接收元件输出的电流信号转换为电压信号的前置放大器; 用于从前置放大器输出的电压信号的二进制符号流检测连续相同的二进制符号部分的电路，以响应其检测结果输出时间常数切换信号; 电平检测电路，用于基于响应于时间常数切换信号而被切换/控制的时间常数来检测从前置放大器输出的电压信号的电压电平; 以及放大器，用于放大电平检测电路的输出电压，以将用于控制增益的控制电压施加到前置放大器。

公开(公告)号：US20130343769A1

公开(公告)日：2013-12-26

申请号：US14003139

申请日：2011-04-05

申请人： Masaki Noda ,  Masamichi Nogami ,  Junichi Nakagawa

发明人： Masaki Noda ,  Masamichi Nogami ,  Junichi Nakagawa

IPC分类号： H04B10/60

CPC分类号： H04B10/6931 ,  H03G3/3084 ,  H04B10/693

摘要： An optical receiver including: a preamplifier capable of changing a conversion gain in accordance with a reception level of a received burst signal; a gain control circuit capable of switching between a fast time constant and a slow time constant; and a convergence determination circuit for outputting a time constant switching signal in accordance with a state of the gain control circuit (transient state or steady state) and a reset signal between the burst signals. This configuration can switch the time constant of the gain control circuit at an appropriate timing.

摘要翻译： 一种光接收机，包括：前置放大器，其能够根据接收到的突发信号的接收电平来改变转换增益; 能够在快速时间常数和慢时间常数之间切换的增益控制电路; 和用于根据增益控制电路的状态（瞬态或稳态）输出时间常数切换信号和突发信号之间的复位信号的会聚判定电路。 该配置可以在适当的时刻切换增益控制电路的时间常数。

公开(公告)号：US20070098416A1

公开(公告)日：2007-05-03

申请号：US10585458

申请日：2005-09-28

申请人： Masamichi Nogami ,  Junichi Nakagawa ,  Masaki Noda ,  Toyoaki Uo

发明人： Masamichi Nogami ,  Junichi Nakagawa ,  Masaki Noda ,  Toyoaki Uo

IPC分类号： H04B10/06

CPC分类号： H04L25/061 ,  H03G3/3084 ,  H04B10/6931 ,  H04B10/695

摘要： A first average detecting circuit detects an average of output signals of a pre-amplifying unit that controls an amplification gain based on a result of comparison between an output of the first average detecting circuit and a predetermined reference voltage. A discriminating circuit receives an output signal of the pre-amplifying unit as an input signal and performs a signal discrimination of the input signal based on a threshold. A second average detecting circuit detects an average of input signals to the discriminating circuit. The discriminating circuit receives an output of the second average detecting circuit as the threshold.

摘要翻译： 第一平均检测电路基于第一平均检测电路的输出与预定参考电压之间的比较结果来检测控制放大增益的预放大单元的输出信号的平均值。 识别电路接收预放大单元的输出信号作为输入信号，并且基于阈值执行输入信号的信号鉴别。 第二平均检测电路检测到鉴别电路的输入信号的平均值。 识别电路接收第二平均检测电路的输出作为阈值。